# Invaders(Simple) vs Arcadium

The clearest difference is in-app purchases: Invaders(Simple) at none against Arcadium's 14. Invaders(Simple) also leads on ads (none vs shown) and iOS requirement (8.0 vs 15.0). Arcadium's advantage is review sentiment (95% vs 63%) and update cadence (every 3 months vs every 20 months). On price, rating and device support there is nothing between them.

Both are free to download. Arcadium sells 14 one-off in-app purchases. Invaders(Simple) asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Invaders(Simple) against 4.9 for Arcadium. That said, the two scores are not equally well evidenced: Arcadium has 119 ratings behind it against 1, so its average is the more settled of the two. Written reviews are what separate them: 63% of Invaders(Simple)'s written reviews are positive against 95% of Arcadium's.

Invaders(Simple) ships an update every 20 months, Arcadium every 3 months. The most recent releases landed on June 1, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Invaders(Simple) | Arcadium |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/invaderssimple/id910019357/reviews)** | [4.9 (119 ratings)](https://appshunter.io/ios/app/arcadium-space-shooter/id1555937672/reviews) |
| Number of ratings | 1 | **119** |
| Positive reviews | 62.5% of reviews | **94.7% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 20 months | **Every 3 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 5 MB | 91 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Masanao Baba](https://appshunter.io/developer/803806609) | [Luciano Bercini](https://appshunter.io/developer/1553291661) |

## What reviewers say

### Invaders(Simple)

[App page](https://appshunter.io/ios/app/invaderssimple/id910019357)

A classic retro shooter game inspired by Space Invaders. Experience simple, nostalgic gameplay with a focus on pure shooting action. Perfect for quick gaming sessions.

**Highlights:** Retro shooter gameplay, Classic arcade style, Simple controls, Nostalgic experience

**Features:** macOS Compatibility

**In-app purchases:** none


### Arcadium

[App page](https://appshunter.io/ios/app/arcadium-space-shooter/id1555937672)

Command a fighter ship to defend Earth from alien invaders in this fast-paced arcade shooter. Blast through waves of enemies, collect power-ups, and permanently upgrade your ship for an infinite fight for survival. Enjoy classic retro shmup action with modern twists and one-finger controls.

**Highlights:** Unique spaceships with special skills, Endless alien waves and boss battles, Permanent ship upgrades and mastery perks, Classic arcade shmup gameplay, One-finger controls, Offline play

**Features:** Vision Pro support

**In-app purchases (14)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1000 gems | $0.49 | one-time |
| 2000 Gems | $0.99 | one-time |
| 3000 gems | $1.99 | one-time |
| Extra HP | $2.99 | one-time |
| Artemis | $2.99 | one-time |
| Hermes | $2.99 | one-time |
| Ares | $3.99 | one-time |
| Ad-Free Revival | $3.99 | one-time |
| 10000 Gems | $3.99 | one-time |
| Aion | $3.99 | one-time |
| Aphrodite | $3.99 | one-time |
| Double gems | $4.99 | one-time |
| Pop-up Ad Removal | $4.99 | one-time |
| 30000 Gems | $8.99 | one-time |


## Frequently asked questions

### Is Invaders(Simple) free?

Invaders(Simple) is free to download, with no in-app purchases.

### Is Arcadium free?

Arcadium is free to download, with in-app purchases available.

### Which has better reviews, Invaders(Simple) or Arcadium?

Invaders(Simple) is rated higher. Invaders(Simple) averages 5.0 out of 5 from 1 ratings, while Arcadium averages 4.9 from 119 ratings.

### Do Invaders(Simple) or Arcadium have ads?

Arcadium shows ads; Invaders(Simple) does not.

### Which is updated more often, Invaders(Simple) or Arcadium?

Invaders(Simple) ships an update every 20 months, and Arcadium every 3 months. Most recently, Invaders(Simple) was updated on June 1, 2026 and Arcadium on September 17, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*